Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

This science fair project idea compares the cuteness reaction between genders.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

This science fair project idea examines the reason boats are shaped and engineered.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Science fair project that examines the relationship between fluid flow rate, pressure, and resistance.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Cleaning can be a chore, but not with this sudsy experiment!

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?